A Sterling, Va., Costco opened at its regular time Thursday, less than a day after sheriff's deputies fatally shot a woman who came at officers with scissors and a knife.

The melee began at about 3 p.m. Wednesday, when store employees noticed the woman acting oddly while handing out pizza samples, said Loudoun County Sheriff Mike Chapman.

The woman has been identified as 38-year-old Mhai Scott of Sterling.

Scott reportedly became upset when she ran out of pizza, reported Northern Virginia Bureau Chief Julie Carey. Witnesses said she was waving a knife and scissors, threatening employees.

Deputies were called to the store to handle the disturbance. After they arrived, Scott -- who worked for a company that handles sampling at Costco stores -- approached the officers with the sharp items, authorities said.

One deputy tried to use a stun gun on Scott, but Chapman said the stun gun "did not work," and another deputy fatally shot her.